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【简答题】
载波频率为25MHz,振幅为4V,调制信号频率为400Hz的正弦波,最大频偏Δf=10kHz,试分别写出调频波表达式u FM (t)=(),调相波表达式u PM (t)=()。
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举一反三
【单选题】I wonder how she will to the news if I tell her she is not going to get a raise this year.
A.
act
B.
reflect
C.
react
D.
reply
【单选题】— Must I tell her the good news at once? — No, you ______. You may wait until she comes back. [     ]
A.
mustn't
B.
needn't
C.
can't
【单选题】从业人员申请人符合《证券业从业人员资格管理办法》规定条件的,中国证券业协会应当自收到申请之日起( )天内,向中国证监会备案,颁发执业证书。
A.
15
B.
20
C.
30
D.
45
【单选题】按货物损失的程度划分,海上损失可分为全部损失和P161
A.
共同海损
B.
单独海损
C.
部分损失
D.
少量损失
【单选题】I wonder how she will to the news if I tell her she is not going to get a raise this year.
A.
repeat
B.
react
C.
reassure
D.
restrain
【简答题】catch ___________(过去式)____________(过去分词)
【单选题】Naturally, when I tell her what to do, my daughter ________ go and do the opposite! [     ]
A.
may
B.
can
C.
must
D.
should
【简答题】写出下列动词的过去式和意思 put catch come play understand
【简答题】患者,女性,因误服有机磷杀虫药中毒,给予抗胆碱药后瞳孔较前扩大,颜面潮红,口干,皮肤干燥,心率加快,应考虑出现了
【单选题】申请人符合《证券业从业人员资格管理办法》规定条件的,中国证券业协会应当自收到申请之日起( )日内,向中国证监会备案,颁发执业证书。
A.
10
B.
15
C.
30
D.
60
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